Floor polisher



F'LooR PousHER.

APPLICATION lFILED JUNE I3. 1921.

Patented May 3o, 1922.v

' to produce a machine which is simple in. ,15

MACDONALD ELLETT LIIPSCOMB, 0F SWEET SPRINGS, MISSOURI.

` FLooR POLISHER.

Application filed June 13,

To all whom t may concern:

Be it known that I, MACDONALD ELLETT LIrscoMB, a citizen of the Unitedl States, residing at Sweet Springs, in the county of Saline and State of Missouri, have invented a certain new and useful Improvement in Floor Polishers, of which the following is a complete specification.

This invention relates to floor polishing and scrubbing machines, and has for one of its objects to produce a machine of this character of simple, strong, durable, etlicient and inexpensive constructlon.- Another object is operation and has no complicated parts or connections to get out of order and which, therefore, may be maintained in-good working order by an inexperienced operator.

A further object is to produce a machine of this character which will automatically move across the surface to be polished without any attention by the operator other than tol reverse the machine after it has reached the limit to be polished.

In order that the 'construction may be fully understood, reference is to be had' to the drawing, in which:

Figure 1 is a section on the line I-I of Figure 2.

Figure 2 is a top plan view of the devic partly broken away to more clearly disclose parts otherwise hidden.

Figure 3 is an enlarged detail of the eccentric roller for automatically moving the polisher across the floor.

Figure 4 is a sectionon the line IV-IV of Figure 2.

In the said drawing, where like reference characters identify corresponding parts in all of the figures, 1 is a rectangular frame provided along its longer sides and spa-ced some distance from the lower margin thereof, with two pairs of longitudinal slots 3. Fitting in said slots 3 and adapted for reciprocating movement therein, are two pairsl of ears 4 formed on the side margins of a pair of polishing Vbrushes 5 and 6, or other tools 4which are so proportioned as to raise the frame from the floor, the entire weight of the machine being borne by the brushes as will be vreadily understood, in order that the polishing action may be more eiclently performed.

Just above slots 3, two pairs of beads 7 are formed on the inner faces of the sides of the frame, and which form tracks for Specication of Letters Patent. Patented luay 30 1921. Serial No. 477,109.

pairs of rollers 8, tworollers at each side of each brush, in order to maintain the brushes centralized and 4prevent any frictional cont-act between the edges thereof and the frame, it being evident that the ears 4 engaged in slots 3 will prevent disengagement of the rollers from the tracks.

A pair of cross pieces 9 'connect the sides of frame together and mounted thereon is a motor housing 10 in 'which a motor 11 is secured with its shaft 12 pendin and equipped at its end and with- -in the rame work, with a small gear pinion 13 Which'meshes with a pair ofgear wheels 14 mounted on shafts 15 secured at opposite sides of the center of the frame in a pair of cross pieces 16 connecting the sides of the frame and supported thereby. l i

In order to transmit the circulatory actiony of gears 14 into -reciprocating motion, thebrushes are formed near their rear margins with slots 17 into which pins 18 secured near the peripheries of the gears 14 will depend, it being evident that the rotation of gears 14 will thus reciprocate the brushes downwardly deand that the length of such stroke will be controlled by the distance from the pins 18 to the axis of the gear wheels 14.

It will be apparent from the arrangement shown in Figure 2 that the large gear` wheels. 14, being meshed at diametrically opposite sides of gear pinion 13, will rotate in the same direction and that the brushes .5 and 6 through their pin and slot connections will be reciprocated simultaneously and in opposite directions, that is the brushes will respectively, simultaneously move toward and away from the center of the machine.

In order to provide means for automatic'ally moving the machine along the sur? face of the fioor, a transverse shaft 19 is journaled at the exact center of the long sides of the rectangular frame. A roller 2() is eccentrically mounted on said shaft and is cut away at its ends for the reception of apair of ratchet toothed gears 22 keyed to shaft 19 as is readily apparent.

A pair of rack bars 23-are pivoted at one of their ends to the brush 5 and their teeth are adapted to mesh with gears 22 when said brush moves toward the center of the frame. This construction is so proportioned that it will impart to the eccentric roller 20, one complete revolution on each Vinward move` ment of the brush, thus moving the machine forward by about one-halfthe circumfer.

bars are so constructed that they will impart' no turning movement to the gear wheels 22 on the reverse, that is the outward, travel of brush 5 but lwill swing slightly upward on their` pivots and drag their teeth across the gears without imparting movement thereto. Ak pair of slots 24 are formed on the top of brush 6 in order that the projecting ends of the rack bars 23 may not interfere with the operation of said brush 6 when the brushes are traveling inward, as will be readily understood. It is believed that no recapltulation of the operation ot the device is necessary.

From the above description, it will be apparent that I have produced a machine of the character described which possesses all of the features of advantage set forth as desirable and while I have described and illustrated the preferred embodiment oit the same, I reserve the right to make all changes which properly fall within the spirit and scope of the appended claims.

I claim- 1. A floor polishing device comprising a frame, a brush mounted for reciprocating action in said frame, a motor carried by said frame, means actuated by the motor for imparting reciprocating action to said brush', an eccentric roller and adapted for intermittent engagement with the floor for imparting intermittent travel to the device, and means whereby said roller is actuated from said motor.

2. In a device of the character described, a frame, a brush mounted for reciprocating action in said frame, a motor carried by said mounted in said frame,

frame, a wheel mounted for .rotation in said frame, means for imparting rotation from 40 said motor to said wheel, a pin and slot connection between said wheel and said brush,

an eccentric roller mounted in said frame,

action in said frame, a motor carried by said frame, a wheel mounted for rotation in said frame, means -for imparting said rotation from said motor to said wheel, a pin and slot connection between said wheel and said brush, a shaft mounted transversely of said frame, an eccentric roller on said shaft, a gear wheel mounted on said shaft, and a rack bar pivoted to said brush and adapted to rotate said gear wheel when the brush is reciprocated in one direction.

4. In a'device of the character described, a frame, a pair of brushes mounted for reciprocating action in said frame, a motor carried by said frame, a gear pinion actuated by said motor, a pair of wheels enmeshed with said gear pinion at opposite sides thereof and having pin and slot connections with said brushes, a shaft mounted transversely of said frame, a roller mounted eccentrically on said shaft,a ratchet toothed gear wheel on said shaft, and atoothed rack bar pivoted at one end to one of said pair of `brushes and adapted to mesh with said ratchet toothed gear when the brush is moved in onedirection.

In witness whereof I hereunto alix my signature.

MacDONALD ELLETT LIPSCOMB. 

